undying
adjective
[ ʌnˈdʌɪɪŋ ]
• (especially of an emotion) lasting forever.
• "promises of undying love"
Similar:
abiding,
lasting,
enduring,
permanent,
continuing,
constant,
perennial,
infinite,
unceasing,
perpetual,
ceaseless,
incessant,
unending,
never-ending,
unfading,
immortal,
eternal,
deathless,
never-dying,
indestructible,
imperishable,
inextinguishable,
undiminished,
undestroyed,
sempiternal,